Vocabulary
The distance across a circle going through the center
diameter
What is the diameter of a circle that is 9 in from the center to the edge?
18 in
Calculate the approximate circumference of a circle with a radius of 8 ft.
50.24 ft
Sarah wants to find the area of circle with a radius of 3 cm. Write the expression to solve this.
A=32*π
A=3*3*π
This distance from the center of a circle to the edge
radius
What is the radius of the circle that is 4.8 cm wide?
2.4 cm
Calculate the exact area of a circle with a radius of 5 cm.
25π cm2
The circumference of a circle is 18π cm. What is the radius?
9 cm
This is the distance around a circle
circumference
What is the diameter of a circle that measures 3 cm from the center to the edge.
6 cm
Calculate the exact circumference of a circle with a radius of 4 cm.
8π cm
The area of a circle 9π cm2. What is diameter of the circle?
6 cm
All of the space inside a shape
area
What is the radius of a circle that is 18 mm across.
9 mm
Calculate the approximate circumference of circle with a diameter of 10 in. (Use 3.14 for π)
31.4 in
Peter wants to figure out the area his new watering system will water. His system has a 175 ft pipe attached to the center point and pivot's around to water the ground below. What is the area the pipe waters?
96,162.5 ft2
The value when you divide the circumference by the diameter in a circle
π (pi=3.14)
What is the radius of the circle with the length from the center to the edge equal to 3.5 cm?
3.5 cm
Calculate the approximate area of a circle with a diameter of 12 mm. (Use 3.14 for π)
113.04 mm2
A friend has a circular pool with a diameter of 24 ft. It needs to have a cover to keep the heat in at night. The local pool company sells pool covers for $1.50 per square foot. To the nearest dollar, how much will it cost to cover the pool? (Use 3.14 for π)
$678